CN103849871A - High-abrasion-resistance scraper knife edge metal ceramic coating and preparation method thereof - Google Patents
High-abrasion-resistance scraper knife edge metal ceramic coating and preparation method thereof Download PDFInfo
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- CN103849871A CN103849871A CN201410057145.5A CN201410057145A CN103849871A CN 103849871 A CN103849871 A CN 103849871A CN 201410057145 A CN201410057145 A CN 201410057145A CN 103849871 A CN103849871 A CN 103849871A
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Abstract
The invention relates to a high-abrasion-resistance scraper knife edge metal ceramic coating and a preparation method thereof. The high-abrasion-resistance scraper knife edge metal ceramic coating is formed by cladding Fe-base alloy and Si-Al-C-N noncrystal particles at a high temperature; in parts by weight, the components are as follows: 10 to 20 percent of Fe-base alloy and 80 to 90 percent of Si-Al-C-N noncrystal particles. The preparation method comprises the following steps of (a) mixing the Fe-base alloy and the Si-Al-C-N noncrystal particles, grinding the mixture into metal ceramic powder slurry, and uniformly coating the surface of a scraper knife edge with the metal ceramic powder slurry; (b) placing the scraper knife edge which is coated with the metal ceramic powder slurry into a workpiece box which is protected by a nonoxidant atmosphere, heating and melting the metal ceramic powder slurry and covering the surface of the scraper knife edge with the melted metal ceramic powder slurry so as to form the high-abrasion-resistance ceramic coating. By adding the Si-Al-C-N noncrystal particles in the Fe-base alloy, on one hand, the hardness of the metal ceramic coating can be improved, and the hardness is more than HV2000; on the other hand, the friction coefficient of the metal ceramic coating can be reduced and lower than 0.45, so that the abrasion of the scraper knife edge in operation can be reduced.
Description
Technical field
The present invention relates to wear resisting steel technical field, be specifically related to a kind of high abrasion cutting edge metal-ceramic coating and preparation method thereof.
Background technology
Cutting edge is to shovel, dig the key components and parts of working mechanism in engineering machinery, when operation, cut material (as sand, stone, soil, slag etc.) by it, thereby with material generation strong friction and shock, therefore require cutting edge to there is good intensity, toughness and Hardness Match.
The IE0921 series of the NM360 wear resisting steel series of China's exploitation or Caterpillar Tractor's approval, thermal treatment rear surface hardness can reach HRC39 ~ 47, shovels while digging the material operations such as crushed stone but be applied to, and its hardness awaits further raising.The high silicon obdurability wear resisting steel SHSC-3 of Komatsu of Japan exploitation, more than thermal treatment rear surface hardness can reach HRC50, but owing to having added a large amount of element silicons, has reduced plasticity and toughness, and steel plate machining property is poor.
Publication number is that the Chinese invention patent of CN103205639A discloses a kind of shovel loader cutting edge and preparation method thereof, by adding multiple alloy element and special preparation technique, more than the hardness of perching knife shear-steel can reach 50HRC, shovel while digging the material operations such as crushed stone but be applied to, its hardness awaits further raising, meanwhile, the frictional coefficient of steel is higher (adopts Si
3n
4ball is as to grinding pair, and its frictional coefficient can reach 0.9), when being applied to shovel and digging the material operations such as crushed stone, wearing and tearing are very fast.
Publication number is that the Chinese invention patent of CN1669726A discloses a kind of high abrasion steel making method, and it is by carrying out ion implanting tungsten to steel and carburizing and quenching processing improves wear resisting property.Ion implanting carbide layers thickness 1 ~ 2mm, surface hardness reach HRC 56 ~ 60.But ion implanting tungsten complex process, cost is high, production efficiency is low.
Summary of the invention
The cutting edge metal-ceramic coating that provides a kind of high abrasion, high rigidity and frictional coefficient less in order to overcome the deficiencies in the prior art is provided.
For achieving the above object, the technical solution adopted in the present invention is: a kind of high abrasion cutting edge metal-ceramic coating, and it is formed by Fe base alloy and the at high temperature cladding of Si-Al-C-N amorphous particle; By weight percentage, described Fe base alloy content is 10 ~ 20%, and described Si-Al-C-N amorphous particle content is 80 ~ 90%.
Optimally, the element wt per-cent in described Fe base alloy is as follows, Fe: >=50%, Si :≤2 %, and C :≤2 %, B :≤0.01%, P :≤0.1%, S :≤0.05%, surplus is one or more in Ti, Cr, Ni, Mn, Mo, W.
Optimally, described Si-Al-C-N amorphous particle dia≤20 μ m.
Another object of the present invention is to provide a kind of preparation method of high abrasion cutting edge metal-ceramic coating, comprises the following steps successively:
(a), by after Fe base alloy and Si-Al-C-N amorphous mix particles, grind and form metal ceramic powder slip and be evenly coated on cutting edge surface;
(b) cutting edge that is coated with metal ceramic powder slip is placed in to the workpiece box of non-oxidizing atmosphere protection, heating of metal ceramic powder slip is to melting and be covered in cutting edge surface and form described high abrasion metal-ceramic coating.
Optimally, in step (a), described metal ceramic powder slip coating thickness is 0.3 ~ 2 millimeter.
Optimally, in step (b), described type of heating is LASER Light Source heating.
Further, in described step (b), LASER Light Source is by the melting of metal ceramic powder slip and be covered in a high abrasion metal-ceramic coating band of cutting edge surface formation, rotary spading machine blade forms a high abrasion metal-ceramic coating band again at an established high abrasion metal-ceramic coating band edge subsequently, repetitive operation to the whole claddings of metal ceramic powder slip form high abrasion metal-ceramic coating band, and all high abrasion metal-ceramic coating band forms one deck high abrasion metal-ceramic coating on cutting edge surface.
Further, described preparation method also comprises: (c) on the high abrasion metal-ceramic coating of described cutting edge surface, form one or more layers high abrasion metal-ceramic coating again, make its thickness reach 1 ~ 10mm.
Because technique scheme is used, the present invention compared with prior art has following advantages: high abrasion cutting edge metal-ceramic coating of the present invention, by add Si-Al-C-N amorphous particle in Fe base alloy, can improve metal-ceramic coating hardness on the one hand, more than hardness can reach HV2000; The frictional coefficient that can reduce on the other hand metal-ceramic coating, makes it lower than 0.45, thus the wearing and tearing while reducing cutting edge operation.
Embodiment
To be elaborated to the preferred embodiment of the invention below:
Embodiment 1
Adopt No. 45 steel to be prepared into the cutting edge that 15mm is thick, prepare thickness on surface and be 5mm and containing 10wt%(weight percent) the high abrasion metal-ceramic coating of Fe base alloy, 90 wt% Si-Al-C-N amorphous particles, obtain the thick cutting edge with high abrasion metal-ceramic coating of 25mm.Described high abrasion cutting edge metal-ceramic coating is prepared according to following operation:
(a), by weight percentage, by after 10wt%Fe base alloy powder and the nano amorphous mix particles of 90 wt%Si-Al-C-N, put on high energy ball mill ball milling 2 hours, form metal ceramic powder slip; Wherein the element wt per-cent in Fe base alloy powder is as follows: Fe:50%, Ni:30%, Cr:15%, Mn:3.434%, Si:1%, C:0.5 %, B:0.006%, P:0.04%, S:0.02%, Fe base alloy powder granularity 35 μ m, Si-Al-C-N amorphous size of particles 18 μ m; This powder slip is evenly coated on to cutting edge surface, and coating thickness is 2 mm;
(b), the cutting edge of metallizing ceramic powder be placed in to the workpiece box of Ar atmosphere protection and move to LASER Light Source, LASER Light Source is by metal ceramic powder cladding, and forming a width on cutting edge surface is the high abrasion metal-ceramic coating band that 3mm, thickness are 1mm; Cutting edge is rotated, make LASER Light Source by metal ceramic powder cladding, forming a width at established high abrasion metal-ceramic coating band edge is the high abrasion metal-ceramic coating band that 2.5mm, thickness are 1mm again, and the lap width that wherein goes up a coated tape and this coated tape is 0.5mm; Repeat previous step until the whole claddings of the metal ceramic powder of cutting edge surface-coated form high abrasion metal-ceramic coating band, all high abrasion metal-ceramic coating band forms on cutting edge surface the high abrasion metal-ceramic coating that a layer thickness is 1mm;
(c), repeating step (b) 4 times, on the high abrasion metal-ceramic coating of cutting edge surface, form again 4 floor height wear-proof metal ceramic coatings, making cutting edge surface high abrasion metal-ceramic coating thickness is 5mm.
Embodiment 2
Thick and containing the high abrasion metal-ceramic coating of 15wt% Fe base alloy and 85 wt% Si-Al-C-N amorphous particles at the thick SHSC-3 cutting edge surface preparation 1mm of the 30mm of Japanese Komatsu exploitation, obtain the cutting edge with high abrasion metal-ceramic coating that 32mm is thick.Described high abrasion cutting edge metal-ceramic coating is prepared according to following operation:
(a), by weight percentage, by after 15 wt%Fe base alloy powders and the nano amorphous mix particles of 85 wt%Si-Al-C-N, put on high energy ball mill ball milling 5 hours, form metal ceramic powder slip; Wherein the element wt per-cent in Fe base alloy powder is as follows: Fe:60%, Ni:18%, Cr:17%, Mn:3%, Mo:1.25%, Si:0.5%, C:0.2 %, B:0.005%, P:0.03%, S:0.015%, Fe base alloy powder granularity 30 μ m, Si-Al-C-N amorphous size of particles 12 μ m; Metal ceramic powder slip is evenly coated on to cutting edge surface, and coating thickness is 0.3 mm;
(b), the cutting edge of metallizing ceramic powder be placed in to the workpiece box of Ar atmosphere protection and move to LASER Light Source, LASER Light Source is by metal ceramic powder cladding, and forming a width on cutting edge surface is the high abrasion metal-ceramic coating band that 3mm, thickness are 0.2mm; Cutting edge is rotated, make LASER Light Source by metal ceramic powder cladding, forming a width at established high abrasion metal-ceramic coating band edge is the high abrasion metal-ceramic coating band that 2.5mm, thickness are 0.2mm again, and the lap width that wherein goes up a coated tape and this coated tape is 0.5mm; Repeat previous step, until make the whole claddings of the metal ceramic powder of cutting edge surface-coated form high abrasion metal-ceramic coating band, all high abrasion metal-ceramic coating band forms on cutting edge surface the high abrasion metal-ceramic coating that a layer thickness is 0.2mm;
(c), repeating step (b) 4 times, on the high abrasion metal-ceramic coating of cutting edge surface, form again 4 floor height wear-proof metal ceramic coatings, making cutting edge surface high abrasion metal-ceramic coating thickness is 1mm.
Embodiment 3
Thick and containing the high abrasion metal-ceramic coating of 20 wt% Fe base alloy-coateds and 80 wt% Si-Al-C-N amorphous particles at the thick cutting edge of 35mm surface preparation 10mm, obtain the cutting edge with high abrasion metal-ceramic coating that 55mm is thick.Described high abrasion cutting edge metal-ceramic coating is prepared according to following operation:
(a), by weight percentage, by after 20 wt%Fe base alloy powders and the nano amorphous mix particles of 80 wt%Si-Al-C-N, put on high energy ball mill ball milling half an hour, form metal ceramic powder slip; Wherein the element wt per-cent in Fe base alloy powder is as follows: Fe:55%, Ni:24%, Cr:13%, Ti:2%; W:1%; Mn:2.5%, Mo:2.167%, Si:0.2%, C:0.1 %, B:0.003%, P:0.02%, S:0.01%, Fe base alloy powder granularity 35 μ m, Si-Al-C-N amorphous size of particles 15 μ m; Metal ceramic powder slip is evenly coated on to cutting edge surface, and coating thickness is 1.4 mm;
(b), the cutting edge of metallizing ceramic powder be placed in to the workpiece box of Ar atmosphere protection and move to LASER Light Source, LASER Light Source is by metal ceramic powder cladding, and forming a width on cutting edge surface is the high abrasion metal-ceramic coating band that 3mm, thickness are 1mm; Cutting edge is rotated, make LASER Light Source by metal ceramic powder cladding, forming a width at established high abrasion metal-ceramic coating band edge is the high abrasion metal-ceramic coating band that 2.5mm, thickness are 1mm again, and the lap width that wherein goes up a coated tape and this coated tape is 0.5mm; Repeat previous step, until make the whole claddings of the metal ceramic powder of cutting edge surface-coated form high abrasion metal-ceramic coating band, all high abrasion metal-ceramic coating band forms on cutting edge surface the high abrasion metal-ceramic coating that a layer thickness is 1mm;
(c), repeating step (b) 9 times, on the high abrasion metal-ceramic coating of cutting edge surface, form again 9 floor height wear-proof metal ceramic coatings, making cutting edge surface high abrasion metal-ceramic coating thickness is 10mm.
Table 1 is cutting edge the performance test results before and after the corresponding high abrasion metal-ceramic coating of preparation in embodiment 1 to 3, comprising: intensity Rm, 25 ℃ of room temperature impelling strength, hardness, frictional coefficient (adopt Si
3n
4ball is as to grinding pair) and life-span contrast.As can be seen from Table 1, on cutting edge, adhere to after high abrasion metal-ceramic coating, intensity Rm and 25 ℃ of room temperature impelling strength change little, illustrate that intensity and the Toughness of metal-ceramic coating to cutting edge is little, this is because laser melting coating preparation technology does not reduce intensity and the toughness of perching knife shear-steel.But the hardness of cutting edge increases obviously (being increased to 70HRC from 50HRC); Frictional coefficient significantly reduces, and is down to 0.4 from 0.9; And work-ing life under identical operating mode improve more than four times than the cutting edge of not preparing coating.Illustrate that high abrasion cutting edge metal-ceramic coating of the present invention makes cutting edge have good hardness and frictional coefficient coupling, thereby the work-ing life that can improve cutting edge.
Cutting edge the performance test results before and after the corresponding high abrasion metal-ceramic coating of preparation in table 1 embodiment 1 to 3
Above-described embodiment is only explanation technical conceive of the present invention and feature; its object is to allow person skilled in the art can understand content of the present invention and implement according to this; can not limit the scope of the invention with this; all equivalences that spirit is done according to the present invention change or modify, within all should being encompassed in protection scope of the present invention.
Claims (8)
1. a high abrasion cutting edge metal-ceramic coating, is characterized in that: it is formed by Fe base alloy and the at high temperature cladding of Si-Al-C-N amorphous particle; By weight percentage, described Fe base alloy content is 10 ~ 20%, and described Si-Al-C-N amorphous particle content is 80 ~ 90%.
2. high abrasion cutting edge metal-ceramic coating according to claim 1, it is characterized in that: the element wt per-cent in described Fe base alloy is as follows, Fe: >=50%, Si :≤2 %, C :≤2 %, B :≤0.01%, P :≤0.1%, S :≤0.05%, surplus is one or more in Ti, Cr, Ni, Mn, Mo, W.
3. high abrasion cutting edge metal-ceramic coating according to claim 1, is characterized in that: described Si-Al-C-N amorphous particle dia≤20 μ m.
4. the preparation method of the high abrasion cutting edge metal-ceramic coating described in any one in claims 1 to 3, is characterized in that, comprises the following steps successively:
(a), by after Fe base alloy and Si-Al-C-N amorphous mix particles, grind and form metal ceramic powder slip and be evenly coated on cutting edge surface;
(b) cutting edge that is coated with metal ceramic powder slip is placed in to the workpiece box of non-oxidizing atmosphere protection, heating of metal ceramic powder slip is to melting and be covered in cutting edge surface and form described high abrasion metal-ceramic coating.
5. the preparation method of high abrasion cutting edge metal-ceramic coating according to claim 4, is characterized in that: in step (a), described metal ceramic powder slip coating thickness is 0.3 ~ 2 millimeter.
6. the preparation method of high abrasion cutting edge metal-ceramic coating according to claim 4, is characterized in that: in step (b), described type of heating is LASER Light Source heating.
7. the preparation method of high abrasion cutting edge metal-ceramic coating according to claim 6, it is characterized in that: in described step (b), LASER Light Source is by the melting of metal ceramic powder slip and be covered in a high abrasion metal-ceramic coating band of cutting edge surface formation, rotary spading machine blade forms a high abrasion metal-ceramic coating band again at an established high abrasion metal-ceramic coating band edge subsequently, repetitive operation to the whole claddings of metal ceramic powder slip form high abrasion metal-ceramic coating band, all high abrasion metal-ceramic coating band forms one deck high abrasion metal-ceramic coating on cutting edge surface.
8. the preparation method of high abrasion cutting edge metal-ceramic coating according to claim 7, it is characterized in that: described preparation method also comprises step (c): on the high abrasion metal-ceramic coating of described cutting edge surface, form again one or more layers high abrasion metal-ceramic coating, make its thickness reach 1 ~ 10mm.
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| CN105063451A (en) * | 2015-08-31 | 2015-11-18 | 苏州西凌铂睿特种材料有限公司 | Oxidation-resistant cemented carbide material |
| CN105287030A (en) * | 2015-09-22 | 2016-02-03 | 杭州博华激光技术有限公司 | Medical orthodontic clamp and processing method of cutting edge of medical orthodontic clamp |
| CN105603420A (en) * | 2016-03-17 | 2016-05-25 | 苏州范德雅特新材料科技有限公司 | High-wear-resistance cermet coating |
| CN105779996A (en) * | 2016-03-17 | 2016-07-20 | 苏州范德雅特新材料科技有限公司 | High-wear-resisting metal ceramic coating |
| CN106868496A (en) * | 2015-12-11 | 2017-06-20 | 天津工业大学 | A kind of method that laser melting and coating technique prepares anticorrosion antiwear iron-based amorphous coating |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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